Go 1.8 Beta - error when reading local files

[si...@intesoft.net]

Hi

Thanks for making Go 1.8 available - great news!

I've tested it with several different projects and most have worked without problem but one is failing when trying to read local files.

With the api_version set to go1.8, calling ioutil.ReadDir results in "readdirent: bad file descriptor"

Change the runtime back to go1 lists the file correctly:

0 test.txt false

Here's the example code:

package app

import (

"fmt"

"io/ioutil"

"net/http"

)

func test(w http.ResponseWriter, r *http.Request) {

files, err := ioutil.ReadDir("./data")

if err != nil {

http.Error(w, err.Error(), http.StatusInternalServerError)

return

}

w.Header().Set("Content-Type", "text/plain")

w.WriteHeader(http.StatusOK)

for i, f := range files {

fmt.Fprintf(w, "%d %s %t\n", i, f.Name(), f.IsDir())

}

}

Many thanks

Simon

[Morgan Conbere]

I ran into what I expect is a related issue. I can read a local file successfully, but filepath.Glob doesn't return any files while using api_version: go1.8.

Here's a repo that reproduces the issue: https://github.com/mconbere/glob

Deployed with go1.8: https://glob-2017.appspot.com/

Deployed with go1: https://glob-2017-16.appspot.com/

Did you have any luck finding a workaround for 1.8?

Best,

Morgan

[Steven Buss]

I started poking around on this problem yesterday. I'm still investigating but will update the list as soon as I have some guesses.

Please keep these bug reports coming :)

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[Steven Buss]

Thanks so much for this bug report. I found the source of the problem (I wrote a bad patch to File.readdir that happened to not get executed in our tests) and committed a fix for it (and the test env). The deadline for this week's release was last Friday, so it should roll out next week, around the 19th.

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[si...@intesoft.net]

Yay, great news - I'll give it another try after that and let you know if / that it's working.

Many thanks!

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[si...@intesoft.net]

Tested it again and it appears to be fixed now - thanks! :)

[si...@intesoft.net]

Oops, sorry, wrong issue - I meant the other one.

[Morgan Conbere]

Steven, I'm curious to know if there's a current timeline for resolving this issue with the go1.8 toolchain. Knowing even rough anticipated dates would help a great deal with my planning.

Best,

Morgan

Many thanks!

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[Steven Buss]

The bugfix almost made it to production last week but got rolled back due to an issue with go1.6. A new release is going out this week and should be available by Thursday afternoon if we don't run in to any issues.

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[Steven Buss]

This has been rolled out. Please try again and let me know if you are seeing any other errors.

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[Morgan Conbere]

I see everything working correctly in my test app. Looks great!

[si...@intesoft.net]

Working for me too - thanks !

Many thanks!

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[ma...@roybos.nl]

Hi Steven,

Is this update also rolled out in the Europe region (Belgium)?

We are now encountering the exact same issue here.

Kind regards,

Roy Bos

Many thanks!

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[Ernesto Alejo]

Hi,

The error is back not only in Europe, two apps I manage in us-central also fail with the same error: "readdirent: bad file descriptor". Probably a rollback again because of other issues.

Steven, there is another release going out with the fix again?

Many thanks,

Ernesto

[si...@intesoft.net]

Same here, any way I try to real local files now fails with 1.8 although I'm not getting any error - the files just don't appear to be there. Changing to 1.6 makes it work.

[Steven Buss]

Thank you for the reports, and I'm sorry the delay. I was out of the office for the eclipse. We are now aware of this issue and are working on a mitigation.

Many thanks!

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[Steven Buss]

The fix was rolled out a few hours ago. Sorry for the issues!

[si...@intesoft.net]

Awesome, thanks - will test it out tomorrow :)

Many thanks!

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[ma...@roybos.nl]

Thanks for the fast fix, that's great!

I'll check it soon.

Kind regards,

Roy Bos

Many thanks!

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[Ronoaldo José de Lana Pereira]

Oh, wait, there was an eclipse :-O ? I'm too much time in the office geez...

Thanks for the update ;-)

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